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-rw-r--r--packages/connect/src/utils/assert.ts25
1 files changed, 25 insertions, 0 deletions
diff --git a/packages/connect/src/utils/assert.ts b/packages/connect/src/utils/assert.ts
new file mode 100644
index 000000000..f8241aacb
--- /dev/null
+++ b/packages/connect/src/utils/assert.ts
@@ -0,0 +1,25 @@
+import { assert as sharedAssert } from '@0xproject/assert';
+// We need those two unused imports because they're actually used by sharedAssert which gets injected here
+// tslint:disable-next-line:no-unused-variable
+import { Schema, schemas } from '@0xproject/json-schemas';
+// tslint:disable-next-line:no-unused-variable
+import { ECSignature } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+import * as _ from 'lodash';
+
+export const assert = {
+ ...sharedAssert,
+ isOrderbookChannelSubscriptionOpts(variableName: string, subscriptionOpts: any): void {
+ sharedAssert.doesConformToSchema(
+ 'subscriptionOpts',
+ subscriptionOpts,
+ schemas.relayerApiOrderbookChannelSubscribePayload,
+ );
+ },
+ isOrderbookChannelHandler(variableName: string, handler: any): void {
+ sharedAssert.isFunction(`${variableName}.onSnapshot`, _.get(handler, 'onSnapshot'));
+ sharedAssert.isFunction(`${variableName}.onUpdate`, _.get(handler, 'onUpdate'));
+ sharedAssert.isFunction(`${variableName}.onError`, _.get(handler, 'onError'));
+ sharedAssert.isFunction(`${variableName}.onClose`, _.get(handler, 'onClose'));
+ },
+};